Shell-drawing machine



Aug. 4, 1925. 1,548,457- P. J. GREAYER SHELL DRAWING MACHINE Filed Oct.21, 1921 4 Sheets-Sheet 1 F I M HQ ATTORNEYJ 'Aug. 4, 1925.

P. J. GREAYER SHELL DRAWING MACHINE 4 Sheets-Sheet 2 Filed Oct. 21, 1921J, fm/nf/mywr Mfg/Q;

I A TTORNEYS Aug. 4, 1925.

P. J. G REAYER SHELL DRAWING MACHINE 11v VE/VTOR 2 m N K L M Aug. 4,1925.

P. J. GREAYER SHELL DRAWING MACHINE Filed Oct. 21, 1921 4sheets-sneet 4.llIlII!V///////////////// INVENTOR ATTORNEY voru'rsn STATES PATENTOFFICE.

PHILIP J. GREAYER, or'YoNKERs, N W YORK, 'ASSIGNOR, EY MESNEASSIGNMENTS,

OIONE-HALF 'ro IRA N. LIND, DOING BUSINESS As onEsoENr SPECIALTYoomrANY, or NEW YORK, N. Y., AND oNE-HA'LE r nAvIn LIND.

SHELL-DRAWING MACHINE.

- Application filed October 21, 1921. Serial No. 509,323.

- To all whom it'may camera:

Be it knownthat I, PHILIP J. GREAYER,

a subject of the King of Great Britain, and resident of Yonkers, inthe'county. of Westchester and State of New York, have invented certainnew and useful Improvements in Shell-Drawing Machines, of whichfollowing is a specification.

This invention relates to a shell drawing the ' 0 machine and moreparticularly to a machine or press for making successive draws on ametal blank to form deep drawn shells;

and has special reference to the provision of a machine of this naturein which sheet mate-' rial fed to the press is cut and drawn in.

a series of successive draws for making the shell in a single set ofoperations or strokes of thepress.

A prime desiderat-umof my present invention comprehends the provision ofa machine of'the nature referred to in which tubular articles or shellshaving a depth which greatly exceeds the shell diameter may be producedin a single stroke or operation of the machine, the parts of themachine,

being so constructed and interrelated as to provlde an apparatus ofrelatively smallmass and bulk and of relatively high speed compared withprior shell drawing machines of the Same power, 7

In prior apparatus for shell drawing where deep drawn articles such asboxes, battery cups, cartridge shells and similar seamless drawn tubulararticles were desired 3 to be, produced with machinery of smallweightand size and high speed, a metal of diflerent machines, a shallowembryo cup:

40 being produced at the first operation with the first machine, adeeper drawn cup being then produced at a subsequent operation eitherwith a different machine or with a structural modification of themachine used for the first drawing. In the use of such apparatus themultiple handling by the operator of the blank and the embryo cup andthe multiple machine operations accomplished at separate times forfirst-producing the embryo cup and then the finished cup resulted, aswill be readily apparent, in a relatively high production cost. Where aplurality of machines were used for producing the successive draws, thecost of installation and upkeep of the additional machiner'y necessaryadded its component or increment to the production cost of themanufactured article. Miltiple handling and operation, besidesdirectlyincreasing the cost of manufacturing of the cups or shells,resulted in subjecting the cups to increased liability of cup breakagesand in subjecting the machinery to increased liability of breakdowns,the cost of production being thereby further enhanced. To eliminate thismulti- 5 ple handling and operation it has been suggested that the blankbe subjected to a series of successive draws in one machine to produce afull drawn cup in a single operation. Although this form of machine hasbeen suggested, there has been, to my knowledge, no machine of this typethat has been practical and commercial enough to warrant generaladoption, prior suggestions having involved machinery of low powercapable of producing only relatively small articles the slow andtherefore inefficient to permit of practical adoption in the art. To theend of eliminating the multiple handling and manipulation of thearticles as practised with machines of prior makes, my present inventioncontemplates the provision of apparatus for affecting all the necessarydrawsto produce deep drawn shells with a single machine and in a.singleoperation, the apparatus having the desired speed for largecapacity or quantity production and having the compactness, strength,simplicity of construction and eficiency desired for a shell drawingmachine. v i The principal objects of my invention may therefore be said:to include, besides the provisionv of a shell drawingmachine having thecharacteristics and performing the functions above referred to, theprovision of a shell drawing machine capable of effecting three orIIIOIBSUCCGSSlVG draws in which the operated and operating parts of themachine are so nested or massed together as to permitv any number ofsuccessive drawing operations; the provision of a machine of this typein which the said operated and operating parts of the machine are sonested as to yield an apparatus in which the parts mutually support andstrengthen each other, the size of each part being thus capable ofreduction with the number of operating parts corelatively capable ofbeing increased, a large number of draws being thus obtained with amachine of relatively with a minimum of wrinkling and a mini mumof'breakages; the further provision of a novel support for the femaledies; .the provision of a machine of the type referred to in which theshells or cups are produced from sheet materialfed to the press in a Inovel manner, permitting the high speed operation desired and thegeneral provision of a machine of this nature in which the parts arerelatively few in number compared with the manifold functions performedthereby and in which the machine is capable of simple control andefiicient operation.

To the accomplishment of the foregoing and such other objects as mayhereinafter appear, my invention consists in the elements and theirrelation one to the other, as hereinafter particularly described andsought to be defined in the claims, reference being had to theaccompanying drawings which Show a preferred embodiment of my inventionand in which:

Figure 1 is a front elevational view of the shell drawing machine of myinvention with parts broken away,

Figure 2 is a right end elevational view of the machine with partsbroken away,

Figure 3 is an enlarged detail cross sectional View of the cooperatingmale and female dies showing the male dies in ascended or fullyretreated position,

Figure 4 is a. cross sectional View of the same showing the male dies inmating cooperation with the female dies and in fully advanced position,

Figure 5 is a plan view of the parts shown in Figures 3 and 4, v

Figure 6 is an elevational view taken in crossd'section along the line66 of Figure 2, an

Figures 7 and 8 are views of details.

One of the desiderata .of my invention, as hereinbefore referred to,comprehends the provision of a shell drawing machine or press in whichdeep drawn shells may be obtained from sheet material in a single set ofoperations or strokes of the press. To accomplish this my inventioncontemplates an-apparatus in which a series of successive draws may beeffected operative on sheet material to produce therefrom, throughsuccessive embryo stages, the finished deep drawn shell, the series ofsuccessive draws being accomplished in one operation of the presswithout any annealing between draws. To this end I provide a series ofmatrices or female dies having openings of graduated diameters and aseries of telescoping punches or male dies adapted for matingcooperation with the matrices to effect the series of successive draws.Referring to Figures 1 and'2 of'the drawings, wherein are shown thefront and side elevational views of an exemplification of my invention,I provide the operatin bed 10 supported on suitably spaced stan ards or.legs 11 and from the bed 10 depends a casing or housing 12 adapted forsupporting and housing the series of female dies or matrices, the latterbeing shown in detail in Figures 3 and 4 of the drawings. Referring tothese figures, I provide a series of superposed female dies 13 to 18inclusive, the said dies being arranged in stepped relation and havingope-nings of graduated diameters, the die 13 com-' prising a cutting diestationarily located. and fixed to the casing 12, the dies 14 to 18comprising annular members removably mounted in the casing 12. The diesor matrices 14 to 18 are spacedly mounted in the casing 12, spacingcollars 19 to 22 inclusive being provided for spacing the matrices in apredetermined manner, the collars being interposed between the matrices,as is clearly shown in Figures 3 and 4 of the drawings,

The matrices or dies 14 to 18 and the spacing collars 19 to 22 areremovably inserted in the housing 12 from beneath the bed and aresupported in position in the said housing by means of the slida'blytapered shelf 23 received in suitable guides or grooves 24 and 25 in thehousing 12, the slidable shelf 23 being provided with a'handle 26adapted to be grasped by the operator for moving the shelf into and outof the casing when the matrices are desired to be removed or reinserted.By the provision of this means whereby the matrices may be removed andinserted from beneath the bed 10 it will be apparent that these matricesmay be handled with perfect safety by an operator, the operator orworkman sing in no danger of loss of limb if the press is operatedduring removability or reinsertion of the matrices.

Cooperating with the matrices 13 to 18 inclusive I provide a series oftelescoping punches or male dies, 27, 28, 29, 30, 31 and 32, theoutermost punch 27 cooperating with the matrix 13 for cutting a metalblank from a sheet material 33, which is fed to the punches in a mannerto be described hereinafter, the sheet material being fed between thecutting punch 13and a plate 34 spaced ures 3 and 4 of the drawings. Thepunches 28 and 32 cooperate in turn with the matrices 14 to 18 fordrawing the sheet .metal blank successively from the blank into ashallow embryo cup, then intoa deeper and deeper drawn cup until thefinished cup is I formed by the cooperation of the innermost punch 32and the lowermost matrix 18, the cup then assuming the position as shownat 36 in Figure 4 of the drawings, expulsion of the cup from the machinebeing effected upon the retreat of the punches.

For the purpose of producingvcups in which any wrinkling is entirelyeliminated, the punches 27 to 32 cooperate with the matrices forholdingthe blank and the embyro cups in each drawing by the next successivepunch. Thus, after the outermost punch 27 cuts the blank from the sheetmaterial 33, the said punch 27 descends into. engagement with the matrix14, the blank being held between the punch and the matrix, the advanceof the next successive punch28 drawing the metal against the hold ingresistance of the punch 27 Similarly, after the punch 28 has performedits drawing function, in cooperation with the matrix 14, the said punch28 cooperates with the next successive matrix 15 for holding the embryocup securely in position during the drawing operation of the nextsuccessive punch 29.' Thus, each punch with the exception of theinnermost punch 32, performs the dual functions of drawing the metal andholding the same for the next successive draw, a smooth, unwrinkled cupbeing thereby obtained.

With the provision of the cooperating punches and matrices described, itwill be seen that during a single operation of the press efi'ecting thesuccessive downward acoperation of the press.

tuation of the series of punches into mating cooperation with the seriesof matrices, that a shell or cup will be produced in a single This isclearly evident from Figure 4 of the drawings, which shows the punchesin fully advanced position with the cup 36 being expelled, Fig: ure 3showing the punches in ascended or fully retreated position and readyfor the next stroke of the press. 7

For the purpose of reducing uneven draws and to the end that a cup ofwhich the metal has a uniform thickness throughout may be obtained, andto the further end of effectively minimizing and in fact eliminating cupbreakages resulting from drawing strains, 1 provide a novel and simpleresilient support forthe female dies ormatric es. This support comprisesmeans for yieldingly offering resistance to the holding punches and forofi'ering suchresistance circumferentially .of the dies. This is shownin Figure 4 of the drawings, the said means comprising- .massed tosecure the which may be made .of rubber, the said buffer being confinedbetween the flanged annular member 38 and the ring 39, the buffer 37 andits supporting parts being arranged beneath the bottommost matrix 18 andsupported preferably directly on the shelf 23. This annular buffer orbumper is effective with each ofthe dies and punches and offersresistance to, the dies and punches when the same cooperate .for drawingand holding the metal blank or the embryo shell. By the provision ofthis bumper means unevenness of material is compensated for and uniformdrawing with consequent reduction of liability of breakdowns and in factsubstantial elimination of breakages has been obtained.

A further desideratum of my invention, as hereinbefore referred to,contemplates the provision of a shell drawing machine having therequired strength and power for making deep draws and having arelatively small mass or weight and bulk and a relatively high resultingspeed of operation compared with prior shell drawing machines which areadapted for making the same depth of draw on blanks or planchets ofsheet material having a given thickness. For the purpose ofaccomplishing these ends, the operated and operating parts of my machineare constructed and arranged in massed or nested relation, such that theparts mutually support and strengthen each other, adjacent parts aidingin taking up the strains and stresses to which adjoining parts aresubjected in the shell drawing operation of the machine. Referring toFigures 1 to 4, and

more particularly to Figures 3 and 4 of the drawings, I'show the mannerin which the operated parts of the machine are nested or desireddecreased weight and bulk and the desired increased strength and speed.of operation. For supporting the telescoping punches 27 to 32 I providea series of nested rams 40, 41, 42, 43, 44 and 45," the rams 40 to 44comprising c vlindrical members or sleeves and the ram 45 preferablycomprising a rod, these rams being constructed to have a sliding fitwithin one another, as is particularly shown in Figures 3 and 4 of thedrawings. The bottoms of the rams 40 to 44 are provided with the flangeddisks 46 to 50 inclusive, the annular flanges of said disks beingthreaded and received by correspondingly threaded portions of the rams40 to 44. The disks 46 to 50 are intended for receiving and supportingthe punches 27 to 31 and to this end the said disks are centrally tappedto receive the upper threaded ends 51 to 55 inclusive of the punches.The innermost punch 32 may be directly connected to the rod 45 byproviding the upper end of the punch 32 with a threaded portion 56received by a suitably tapped bore 57 in the said rod 45. The forming'tools or punches are threaded into the disks in the assembling of theseparts, the said disks being threaded into the rams, the disks being eachprovided with a series of spaced recesses or apertures 58 arrangedcircumferentially in the disk peripheries, the said apertures beingintended for the reception of a tool to permit facility of rotation ofthe said disks into the respective rams. For the purpose of permittingaccessibility to the inner rams and disks, the rams 40 to 44 are eachprovided with openings or windows 59, 60, 61, 62 and 63 respectively, asshown particularly in Figure 3 of the drawings. The rams 40 to 45 towhich the operating punches are connected have, it will be noted, agreater thickness of material and a greater diameter than the respectivepunches with which they are associated. By the pro vision of these ramsa construction is afforded in which the punches may be considerablyreduced in diameter and thickness in order to provide a narrow resultingcup, the necessary strength and power being obtained mainly in theenlarged operating rams 40 to 45 inclusive. The provision of the ramsalso afi'ords means for connecting the relatively small punches tooperating mechanism of the desired strength and power, as will bedescribed more in detail hereinafter. By

the provision of rams which are arranged in nested relation having asliding fit within one another, the thickness of each ram may beconsiderably reduced, each ram holding the adjoining ram in properlyspaced position, such ram laterally supporting and taking up the strainsand stresses in the next ad joining ram, the outer ram 40 only beingmade of increased thickness. In this manner and by this means a largenumber of rams may be nested together in a relatively small space, thebulk of the machine being substantially reduced without sacrificingpower or strength. This nested arrangement of the operated parts havinga relatively running or sliding fit, minimizes the bulk and weight,increases the number of operating punches and rams possible and permitsa construction having the desired high speed of operation yielding anapparatus capable of quantity production.

Connected to the rams 40 to 44 inclusive and also arranged in nested ortelescoping relation, I provide the supporting members 64, 65, 66, 67and 68, the said supporting members beingvpreferably in the form ofannular links, each annular link being provided with integral upstandingears providing means adapted to be connected to operating elements, thelink 64 being provided with the opposed ears 69 and 70, the links 65 tov68 being in turn provided with the ears 71 to 78 inclusive. The rod 45comprising the innermost ram is also provided wit-h opposed portionsadapted for connection to an operating element and to this end the ram45 is forked at its upper end, providing the forked portions 79 and 80respectively. The annular links 64 to 68 and the parts integraltherewith are con- 7 structed also to permit of their being laterallymassed or nested upon the downward stroke of the punches, this beingclearly shown in Figure 4 of the drawings.

For the purpose of obtaining the desired 75 adjusted'stroke of the ramsand punches relative to the matrices, the nuns are adjustably mounted onthe links 64 to 68 and to this end I provide a series of flanged sleeves81, 82, 83, 84 and 85, the said sleeves 30 being threaded, as clearlyshown in the drawings and being received by internally tapped orthreaded walls of the rams and links respectively, as will be clearlyapparent from an inspection of Figures 3 and 4 par- 85 ticularly. Forthe purpose of facilitating rotation of the threaded sleeves to permitthe desired adjustability, the flanges 86, 87, 88, 89 and 90 of thesesleeves are eachv provided with aseries of spaced perforations 91 ar- 90shown guided for vertical reciprocation in the frame work of themachine, the spaced guide rods, three of which, 102, 103 and 104 areshown in the figures, being provided for this purpose. Fixed to theoutermost ram 40 I provide a plurality of spaced straps or yokes 105,the said straps or yokes en-e. circling the guide rods for guidingcooperation therewith.

Connected to opposite sides of a each of the supporting links 64 to 68and to opposite sides of the innermost ram 45 to produce symmetricalthrusts of each rain, I provide a series of laterally massed or nestedoperating elements. These operating elements may comprise means directlyconnected to the links at opposite sides thereof, but for the purpose offurther decreasing the size of the machine and the weight of the parts,I rovide a series of operating elements pre erably in the form of camsspaced from the links with means provided between the cams and the linksfor amplifying the motion of the operating cams.

Referring now to Figures 2, 6 and 70f the drawings, I provide preferablytwo series of cams arranged one above the other, the cams beinglaterally massed on the frame work of the machine. Referringparticularly to Figure 6, I show keyed to the cam shaft 106 journalledin opposed bearings 107 and 108, a plurality of sets of cams, theoutermost set 109 and 110 being intended for operating the outermost ram40, the other sets of cams 111 and 112, 113 and 114, 115 and 116, 117and 118 being intended for connection-t0 the other rams, as will bedescribed hereinafter. The centralcam 119 is in turn adapted foroperating the innermost rain 45, as will be shown hereinafter. The camsof a set are contoured, as clearly shown in Figures 2 and 6 of thedrawings to provide the successive operation of the rams referred tohereinbefore. -All the cams 109 to 119 inclusive are provided withcentral flanges designated as 120. These flanges encircle the cam shaft106 and suitably-spacethe cams to permit the reception therebetween of aseries of links to be'described presently. Spaced in vertical alinementwith the cam shaft 106,. I preferably provide a second cam shaft 121j-ournalled 1n opposed bearings j 107 and 108, upon which are keyed thesets of cams 122 and 123, 124 and 125,126 and 127, 128 and 129, 130 and131 and the central cam 132, these cams being arranged on the cam shaft121 in a manner similar to the arrangement of the upper series of camson the cam shaft 106. a w

Arranged between the pluralityof sets of cams I provide a series offloating links adapted to be operated downwardly by the upper sets ofcams and upwardly by the lower sets of cams. Referring to Figure 6, theoutermost set of floating links 133 and 134 is arranged between theoutermost set of cams and the bearings for the cam shafts, the link 133being provided with the top roller or cam follower 135 and with thelower roller or'cam follower 136, the link 134 being correspondinglyprovided with the cam followers 137 and. 138 adapted to cooperate withthe respective cams, rotation of the cams efi'ecting'the reciprocationof the links 133 and 134. The links are suitably recessed as at 139, therecesses'receiviiig the flange 120 of the cam, the side walls of'arecess cooperating with the flange of the cam and guidedthereby, therecess being elongated in the direction of the link permit thereciprocation thereof. .In a similar manner and cooperating with theother cams, I provide the sets of links 140 and 141, 142 and 143, 144and 145,146 and 147,148. and 149, each of these links being providedwith cam followers or; rollers collect vely designated as 150cooperating with the respective cams. The links and cams-have a slidingfit withrespect to each other, as particularly shown n Fig e a a gnumber of elements being thus capable of being nested to provide thedecreased mass combined with the desired power in the operating parts ofthe machine.

Upon operation of the machine the upper series of cams move the sets oflinks successively downwardly, the lower series of cams functioning toreturn the sets oflinks to ascended or upper position, the links beingprovided for transmitting the motion of the cams to other operatingelements to be described presently. Arranged substantially centrally ofeach link and located in the spaces between the'said links, I provide aseries of levers comprising the sets of levers 151 and 152, 153 and 154,155 and,156, 157 and 158, 159 and 160, a central lever 161 beingprovided for cooperation with the central set of links 148 and 149. Thelevers 151 to 161 are each fulcrumed at a point behind "the canis, theselevers being connected to the rams for transmitting the motion of theoperating cams to the said rams. Referring to Figure 2. of the drawings,the levers are shown fulcrumed at one end in the bearing frame 162 fixedto the guide rods 163, one of which is shown in Figure'2, the other endsof the levers being shown connected to the rams in a manner as will bepresently described. The levers 151 to 161 are provided at a pointintermediate the ends thereof with slots in which are fitted bushingsdesignated collectively as 164 these bushings receiving rollersdesignated collectively as 165, the said rollers being journalled in thefloating links, one roller being fitted to each link. With the provisionof this means it will be apparent that upon vertical reciprocation ofthe floating links the levers 151 to 161 will be oscillated about thefulcrums thereof, motion of the links being thus transmitted to theseries of levers. The links and levers are also arranged in nestedrelation, a' maximum strength with a minimum mass being thus obtained.By the provision of the levers and links 1 am enabled to further reducethe size of the machine and the size of the operating cams, the leversacting in the nature of an amplifying device for amplifying theoperating strokes of the cams.

The outer or free ends of the operating levers 151 to 161 inclusive areconnected to the links 64 to 68 and to the rod 45, the levers beingconnected specifically to the upstanding ears 69 to 78 formed integrallywith the links and the forked portions 79 and 80 formed integrally withthe rod 45, as particularly shown in Figures 1 to 4 of the drawings. Theconnection between the levers and the links may be a simple, pivotal.

connection, as will be apparent, and in order to provide a furtheradjusting means between the levers and thelinks for independentlyadjusting the operating stroke of the '80 of the ram 45, the said block166 being transversely slidable in a slot 167 provided at the free endof the lever 161. Slidable longitudinally of the lever 161 are aplurality of spaced shims or tapered elements 168 and 169 respectively,the said shims being held against correspondingly tapered walls in thesliding block 166 by means of adjusting screws 170 and 171.- By theprovision of this means it will be apparent that upon loosening one ofthe adjusting screws and tightening up on the other adjusting screw thatthe ram 45'may be adjusted relative to the operating lever 161. Theremaining levers may be similarly adjustably connected to the connectinglinks and the integral ears thereof. It will be observed that each ramis operated from spaced cams comprising a set of cams and spaced levers,these operating elements being connected to spaced portions of a ram, asymmetrical thrust being thus obtained on each ram in the downwardactuation thereof.

For the purpose of providing means in which the operating strokes of thepunches may be substantially varied, I may provide means for adjustingthe fulcrum of the levers, in this manner obtaining a wide range ofadjustment of the operating strokes of the punches. Referring to Figures7 and 8 of the drawings, I show the manner in which the fulcrum of thelevers may be adjusted to provide the' desired result. In these figuresa lever such as 160 fulcrumed 1n the frame 162 is provided with anelongated slot 172, a pivoted block 173 journalled in a slide 174 beingreceived by and being adjustable longitudinally in the said slot 172.The slide 174 is provided with two rows of teeth -17 5 cooperatingwithcomplemental teeth 176 formed on a stationary part of the frame work162, a plurality of securing screws 177 received in suitably .tappedbores' 178 in the slide 17 1 providing means for securing the slide 174in any adjusted position with its teeth engaging the complementalteeth176 in the frame work of the machine. It will be apparent with thisconstruction that the securing screws 177 may be loosened to permit theadjustment of the slide 17 4 and the pivoted block 173 forming thefulcrum of the lever, the slide being secured in any adjusted position.Rough adjustments may be made in this manner, the finer adjustmentsbeing obtained b means of the adjustable links hereinbe ore described.

' For the purpose of driving the operating the spur gear 182. Freelyrotatable on the sleeve 179 I may provide the loose belt wheel 183.Fixed to a cross shaft 184in horizontal'aline nent with the cam shaft121 (see Figure 2) I provide the large spur gear 186 located to one sideof the machine, the said shaft 184 being provided with the small spurgear 187 located on the opposite side of the machine. Meshing with thespur gear 187 I provide the gear 188 freely rotatable on the cam shaft121, the said spur gear 188 carrying a clutch element 189. Keyed to thecam shaft 1211 provide the collar 190 carrying the complemental springactuated clutch element 191, the said clutch element 191 being normallyurged to engage the complemental clutch element 189 by means of a spring192 nected to the cam shaft 106, the idler 196' meshing with the saidgear 197. By the provision of this driving mechanism it will be seenthat upon engagement of the clutch elements 189 and .191 rotationimparted to the belt wheel 180 will be transmitted to the gear 188through the clutch elements and to the cam shafts 121 and 106respectively, the arrangement of gears providing a balanced structure onopposite sides of the machine to properly withstand the shock incidentto successive downward actuation of the punches operated by the cams.For the purpose of connecting and disconnecting the clutch elements Imay provide the usual treadle 198 fulcrumed to the standard 199 andnormally held in elevated position by means of the spring 200, the saidtreadle being connected to the plunger 193 by means of the link 201,aspring 202 anchored on the frame 194 being connected to the link 201 andmore specifically to the securing means 203 which connects the link 201to the plunger 193, and aiding in retaining the plunger in normallyelevated position. It will be apparent that upon actuation of thetreadle 198 downwardly the plunger 193 will be withdrawn, permitting thecomplemental clutch elements 189 and 191 to interengage in locking anddriving position.

Cooperating with the drawing punches and feeding thereto the sheetmaterial 33 from which are cut the blanks drawn by the punches, Iprovide a novel feeding appara tus so associated'with the operation ofthe punches as to feed the sheet material be:

tween the punches and the matrices within the fraction of a second,during which the former are in fully retracted position, and to so feedthe sheet material as to provide for I the greatest economy in thecutting thereof. In the operation of the punches the innermost punchtravels a substantial distance in its advancing and retreating strokes,as will be readily apparent, and during the time consumed by its advanceand retreat the sheet material, as will be readily understood byreference to Figure 4 of the drawings, cannot be fed forwardly for thenext cutting operation. It is only when all the punches are in fullyretreated position, as shown in Figure 3, that sheet feeding is possibleand where speed of operation is a desired end the punches should holdtheir retreated position only for a fraction of a second, as is the casein the present embodiment of my invention. To feed the sheet materialforward within thistime I have provided a feeding apparatus, shown inFigures 1 and 2 of the drawings, in which mechanism is providedoperative on the sheet material to place the same under tension when thematerial is engaged and held by the punches, the mechanism functioningto rapidly feed the material forward in the nature of intermittent jerkswhen the material is released by the retreated punches. To these ends Iprovide (referring to Figures 1 and 2) the friction feed rollers 2049and 205 positioned to the left of the punches and matrices, the feedrollers being suitably -journalled in upstanding brackets 206.

Fixed to the shaft 207 of the lower feed roller I provide the ratchetwheel 208 and rotatably mounted on the said shaft 207 I provide thelever 209, a spring pressed pawl 210 being mounted on said lever andarranged for engagement with the teeth of the ratchet wheel 208.Connected to the outside end of the lever 209 I provide the tenwork 218forming part of the machine, one

end of the said chain 215 being connected to the link 214 as at 219, theother end of the chain being connected to one of the nested levers suchas 158 (see Figure 2). With the provision of this means it will beapparent that as the punches and rams, and more specifically the lever157, moves downwardly during thedrawing operation ofthe machine, thelink 21 1 will be moved upwardly Connected by the chain 215, the lever.209 being caused to ascend, placing the spring 211 under tension, thepawl 210 freely riding over the teeth of the ratchet wheel 208. Afterthe drawing operation when the lever 157 will be moved upwardly toretreated position, the link 214 will be released, the lever 209,however, being prevented from moving by virtue of the fact that thesheet material 33 is held in position by the engagement of the formingpunches, as described hereinbefore. When, however, the punches are movedto fully retreated position, the Sheet, material 33 is released and thelever 209 is caused to move downwardly rap-idly under actuation of thetensioned spring 211, this eflecting the rotation of the feed wheels 204and 205, the rapid rotation of these feed wheels giving a rapid impulseto the sheet material 33, feeding the same forwardly.

he impulse given to the sheet material by the tensioned feeding meanstends to impart thereto a momentum which results in an irregular feedingof the sheet material and in order to eliminate this irregularity offeed and to further effect the'economic feeding of the sheet metal topermit forward feed of I only that amount of metal necessary forproducing a cup, I provide secondary feeding elements which feed forwardjust the right amount of material, the latter feeding means functioningas a check or stop means to prevent the tensioned feeding elements fromfeeding forward too large a quantity of the sheet material. Thissecondary feeding means is shown in Figures 1 and 2 and comprisesthefriction feed rollers 220 and 221 journalled in the brackets 222 and223, the upper feed roller 220 being spring pressed as by means of thespring controlled plungers generally designated as 224:. The feedrollers 220 and 221 are provided with the meshing spur gears 225 and226, thespur gear 225 being positively driven by means of the flexibleshaft 227 connected to the shaft 228 (see'Figure 1) of the spur gear225, the said flexible shaft being, in. turn, directly connected to thecam shaft 121. For

iding purposes the guides 229 and 230 may provided. The gearing of thismechanism is so proportioned that the feed roller 220 and itscooperating roller 221 feed continuously only that amount of sheetmaterial necessary for the production of one cup from the unwinding roll231 journalled in brackets 232 beneath thesaid. feed rollers.

When the spring actuated orspring, ten-f sioned forward feed rollers 204and 205 inn pel the sheet material 33 forwardly, the .momentum of thelatter is checked by the friction feed rollers 220 and 221, theserollers to permit the desired amount of feeding. a The operation of myshell drawingma:

'' permitting: only that amount of slack in the j material between therollers andthe punches lac chine will, in the main, be apparent from theabove detailed description thereof. Upon downward actuation of thetreadle 198 the cam shaft 121 is locked to the drivin gear, the said camshaft 121 being rotated t ereby and effecting the rotation of the uppercam shaft 106. Rotation of these shafts set into motion the top andbottom sets of cams, the top set of cams effecting the downward movementof the'sets of floating links asso-' ciated therewith, the bottom set ofcams ef: fecting the returner upward-movement of the said sets of links.It will be apparent that although I have provided in the presentexemplification of my invention two sets of cams, that one set of camsmay be provided functioning to effect the downward and upward motion ofthe floating links. The links actuated by the cams transmit motion'andpower'to the sets of levers arranged laterally of the machine in nestedrelation, the said levers being connected to the series of rams andpunches in the manner described, the

sets of levers beingjactuated downwardly successively to effect thesuccessive move ment of the punches'27 to 32 in mating relation with:the matrices 13 to 18 inclusive, 2.

deep drawn-shell 36 being produced from the sheet material 33 in thisoperation, the shell 36 being expelled in a simple manner from thebottom of the machine beneath the operating bed. The sheet material 33is given intermittent impulses to cause the same to feed forwardrapidly, the feed. of thesaid sheet material being properly checked by acontinuous roll feed, the intermittent and located on opquantityproduction of seamless tubular drawn articles being thereby obtained ina highly eliicient manner. 7

While Lhave shown my device in the pre ferred form, it will be obviousthat many changes and modifications may be made in the structuredisclosed Without departingthe following claims.

Iclaim: Y 1. In a shell drawing machine adapted for making a series ofsuccessive draws on a from the spirit of the invention, definedin metalblank, a series of nested cup-shaped rams each having a sidewall and abottom wall, a series of telescoping punches one for each ramand-carried by the bottom wall of the same, and means for actuating thea plurality of telescoping punches one connected to the bottom wall ofeach ram, and means for actuating' the rams successively in onedirection; to effect three or more successive draws. 1

2 3.111 a shell drawing machine adapted for making a series ofsuccessive draws on a metal blank, a series of nested cylindrical ramshaving a sliding fit one within the other, aseries of telescopingpunches, a punch connectedto the bottom wall of each ram, the ramshaving graduated diameters of substantially greater dimensions than thediameters of the correspondin punches with 'thewall of aram substantialy greater in thickness than the wall of its corresponding punch, andmeans for actuating the rams successively in one direction to effectthree or more successive draws.

4. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, 21. series of nested ram's, a series oftelescoping punches, one for each ram, provisions comprising a series ofnested mutually supporting ram carrying members adjustably connected tosaid rains and means for actuating the rams successively in onedirection vto effect three .or more successive draws.

v 5. .In a shell drawing machine adapted for making a series ofsuccessive -'draws on a rams .andmeans for actuating the rams sucmetalblank, a series of nested mine, a series cessively in one direction toefiect three or w more successive draws.

6. In a shell drawing machine adapted to making) a series of successivedraws on a metal lank, a series of nested cylindrical rams, a-series oftelescoping punches, a punch connected to each ram, t'he rams havinggraduated diameters of substantially greater dimensions than thediameters of thecorresponding punches, provisions comprising a series ofnested annular .mutually-supporting ram carrying members adjustably Iconected to the said rams and means for ;ac-.

tuating the rams successively in one direction to effect three or moresuccessive draws.

'7. In a shelldrawing machine adapted for making a series" of successivedraws on a metal blank,a s'eries'of nested rams, a series of telescopingpunches, one for each ram, and meansfor actuating the rams successivelyin one direction to efl'ect three or more successive draws, the saidrams having provisions on opposite sides of a dameter thereof adaptedfor direct engagement with said actuating means.

8. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, a series of nested rams, a series of telescopingpunches, one for each ram,

and means for actuating the rains succes punches successively in onedirection to efl'ect three or more successive draws, the saidpunches-having provisions on opposite sides of a diameter thereofadapted for engagement with said actuating means, the said provisionsbeingconstructed 'to permit the same to be laterally the operation ofthe machine.

10. In a shell drawing machine adapted for'makin a series of successivedraws on a metal blink, a' series of matrices having 0 nings ofgraduated diameters, a series 0?. telescopin punches for cooperationtherewith an means for actuatlng the punches successively in onedirection for mating with. the matrices to effect three ormoresuccessive draws; a punch cooperating with amatrix for drawing theblank and cooperating with the next successive matrix for holding theblank for thenext successivedraw, the said punches havingv provisions onop osite sides of a diameter thereof adapted or engagement with said'actuating means, the said provisionsbeing V constructedto permit thesame to be lat- .erally massed or nested inthe operation or the machine.

11. In a shell drawing machine adapted for 'makin a series of successivedraws on a metal lank, a series of. jstationarily mounted matriceshaving openings of graduated diameters, a series :of I telesco'pinpunches for cooperation therewith an means .for actuating the punchessucces- .siv ely in one direction for mating with the matrices toefi'ect threeor more successive draws, a punch cooperating with a matrixfor drawing the blank and cooperating with the next successive matrixfor holding the blank for the next successive draw, the said puncheshaving provisionson o posite sides of a diameter thereof adapted orenmassed or nested in the next successive matrlx for holding thegagement with said actuating means, the said provisions beingconstructed to permit the same to be laterally massed or nested in theoperation of the machine.

12. In a shell drawing machine adapted for making a series of successivedraws onametal blank, a series ofmatrices having openings of graduateddiameters, a series oftelescoping punches for cooperation therewith andmeans for actuating the punches successively in one direction for matingwith the matrices to effect three or more successive draws; a punchcooperating with a matrix for. drawing the blank and,

cooperating with the next successive matrix for holding the blank forthe next successive draw and instrumentalities forresiliently supportingthe said matrices.

13. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, a series of stationarily mounted matrices havingopenings ofgraduated diameters, a series of telescoping punches forcooperation therewith and means for actuating the punches successivelyinone direction for mating with the matrices to effect three or moresuccessive draws; a punch cooperating with a matrix for drawing theblank and cooperating with blank for the next successive draw and anannular bufi'er supporting the said series of matrices.

for reciprocation above'said-bed, a plurality of matrices having opemnperm1t removal and re lace- .ment of the matrices from below the ed; 15.In a shell drawingmachine, a ,beda plurality of telescoping punchesmounted d of graduated diameters located below sai bed, means foractuating thepunches successively for mate. Y ing cooperation with thematrices and means "for releasably supporting the matrices low the bed,the said supporting means eluding a slidable elemen "16'. For usein ashell drawing machine,

a plurality, of stationary matrices having openings of decreasingdiameters arrange in superposed relation and a supporting I meanstherefor including an annular'bufier or cushioning element.

17. For use in a shell drawing machine, a-series of superposed matriceshaving openings of decreasing diameters adapted for cooperation with aseries of plungers to efiect three or more successive draws and meansfor su porting the matrices, the said means inclu 1ng an annular rubberbuffer or cushioning element.

18. For use in a shell drawing machine, a plurality of Stationarymatrices having openings of decreasing diameters arrangedm superposedrelation and a unitary butter or cushioning element arranged forsupporting the plurality of matrices, the buffer being constructed toofier resihent support circumferentially of the matrices. I

19. In a shell drawing machine adapted for makin a series of successivedraws on a metal blan a series of telescoping punches and means foractuating said punches successively in one direction to efiect atleastthree successive draws, the said actuating means including aplurality of cam elements and provisions connecting the cam elementswith laterally spaced portions of the punches.

21. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, a series of nested rams, a series of telescopingpunches, one for each ram, and means for-actuating the rams sue--cessively in one direction to effect three or more successive draws, thesaid actuating meansincluding a plurality of cams massed laterally andarranged for rotation on an axis normal to said direction.

22. In a shell drawing machine adapted for makin a series of successivedraws on a metal bla a series of nested rams, a series of telescopingpunches, one for each ram, and means for actuating the rams successivelyin one direction to eifect three or more successive draws, the saidactuating means including a plurality of cam elements and provisionsconnecting the cam elements with laterall spaced portions of the rams.

23. In a s ell drawing machine adapted for making a series of successivedraws on a metal blank, a series of telescoping punches and means foractuating said punches successively in one direction to effect at leastthree successive draws, thesaid actuating means including a plurality ofelements arranged in 'spacedrelation laterally of the machine.

24:. In a shell drawing machine adapted for makin a series of successivedraws on a metal bla a series of telescoping unches and means foractuating said punc es successively in one direction to effect at leastthree successive draws, the said actuatingmeans including a plurality ofelements er ranged in spaced relation laterally of the machine andprovisions connecting the elements with laterally spaced portions of thepunches.

25. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, a series of telescoping punches and means foractuating said punches successively in one direction to effect at leastthree successive draws, the said actuating means including a pluralityof sets of operating elements arranged for rotation on an axis normal tosaid direction and means connecting an operating element of each set toa punch at spaced portions thereof.

26. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, a series of telescoping punches and means foractuating said punchessuccessively in one direction to effect at leastthree successive draws, the said actuating means including a pluralityof sets of plate cam elements arranged for rotation on an axis normal tosaid direction and means connecting a cam of each set-to a punch atspaced portions thereof.

27. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, a series of nested rams, a series of telescopingpunches, one for each ram, and means for actuating the rams successivelyin one direction to effect three or -more successive draws, the saidrams having provisions on opposite sides of a diameter thereof adaptedfor engagement with said actuating means, the said provisions beingconstructed to permit the same to be laterally massed or nested in theoperation of the machine, the said actuating means including a pluralityof sets of plate cams arranged for rotation on an axis normal. to saiddirection.

28. In a shell drawing machine, a plurality of telescopic punches andmeans for actuatlng punches successively in one direction to effect aplurality of successive draws; the

said means comprising a plurality of levers connected to the pluralityof punches to independently operate the same with the levers arrangedlaterally of the machine and elements for oscillating the said levers.

' 29. In ashell drawing machine, a plurality of telescopic punches andmeans for actuating the punches successively in one direction to effectaplurality of successivedraws; the said means comprisin a lurality; oflevers connected to the p ura ity of punches to independently operatethe same with 'the levers arranged laterally of the machine and aplurality of cam elements for independently oscillating the said levers.

30. In a shell drawing machine, a plurality of telescopic punches andmeans for actu-;

ating the punches successively in one di rection to effect a pluralityof successive draws; the said means comprising a plurality of leversconnected to the plurality of punches to independently operate the samewith the levers arranged in closely spaced or massed relation laterallyof the machine and plate cams also closely spaced in massed relationlaterally of the machine for independently oscillating the said levers.

31. In a shell drawing machine, a plurality of telescopic punches andmeans for actuating the punches successively in one direction to effectaplurality of successive draws; the said means comprising a plurality oflevers fulcrumed at one end on the frame of the machine and connected atthe other end to the plurality of punches to independently operate thesame with the levers arranged laterally of the machine and elements foroscillating the said levers, the'said elements being operative on thelevers intermediate the fulcrum and connected end thereof.

32. In a shell drawing machine, a plurality of telescopic punches andmeans for actuating the punches successively in one direct-ion to effecta plurality of successive draws; the said means comprising a pluralityof levers fulcrumed at one end on the frame of the machine and connectedat the other end to the plurality of punches to independently operatethe same with the levers arranged laterally of the machine and aplurality of cam element for independently oscillating the said levers,the said elements being ope-rative on the levers intermediate thefulcrum and connected ends thereof.

33. In a shell drawing machine, a plurality of telescopic punches andmeans for actuating the punches successively in one direction to effecta plurality of successive draws; the said means comprising a pluralityof levers fulcrumed on the frame of the machine and connected to theplurality of punches to independently operate the same with the leversarranged laterally of the machine and elements for oscillating the saidlevers and provisions for varying the stroke of the punches includingmeans for adjusting the fulcrum of the levers.

34. In a shell drawing machine, a plurality of telescopic punches andmeans for actuating the punches successively in one direction toefi'ccta plurality of successive draws; the said means comprising a pluralityof levers fulcrumed at one end on the frame of the machine and connectedat the other end to the plurality of punches to independently operatethe same with the levers arranged laterally of the machine and elementsfor oscillating the said levers, the said elements being operative onthe levers intermediate the fulcrum and connected ends thereof andprovisions for varying the stroke of the punches including means foradjusting the fulcrum of the levers.

35. In a shell drawing machine adapted for making a series of successivedraws on metal blank, a series ofnested rams, a series of telescopingpunches, one for each ram, and means for actuating the ramssuc cessivelyin onedirection to effect three or more successive draws, the said meanscomprising a series of levers connected to the rams with the leversarranged laterally of the machine and elements for oscillating the saidlevers.

36. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, a series of nested rams, a series of telescopingpunches, one for each ram, and means for actuating the rams successivelyin one direction to effect three or more successive draws, the saidmeans comprising a plurality of sets of levers, one lever of each setconnected to spaced portions of the ramsand elements for oscillating thesaid levers.

37. In a shell drawing machine adapted for making a series of successivedraws on a metal blank, a series of nested rams, a series of telescopingpunches, one for each ram, and means for actuating the rams successivelyin one direction to effect three or more successive draws, the saidmeans comprising a plurality of sets of levers, one lever of each setconnected to spaced portions of the rams and cam elements foroscillating the said levers; the levers and the cam elements beingarranged in massed relation laterally of the machine.

38. In a shell drawing machine, a plurality of telescoping punches andmeans for actuating the punches successively in one direction to effecta plurality of successive draws; the said means comprising a pluralityof levers connected to the plurality of punches to independently operatethe same with the levers arranged laterally of the machine, a pluralityof reciprocable links connected to the levers and elements forreciprocating the links.

39. In a shell drawing machine, a plurality of telescoping punches andmeans for actuating the punches successively in one direction to effecta plurality of successive draws; the said means comprising a pluralityof levers connected to the plurality of punches to independently operatethe same with the levers arranged laterally of the ma chine, a pluralityof vertically floating links connected to the levers and a plurality ofcam elements connected to the links for reciprocating the same.

draws: the said means comprising a plurality of levers connected to theplurality of punches to independently operate the same with the leversarranged laterally of the machine, a plurality of vertically floatinglinks connected to the levers and a plurality of cam elements connectedto the links for reciprocating the same, the levers, links and camelements being arranged in massed relation laterally of the machine.

4.1. A shell drawing machine, in combination, provisions for forming ashell from a metal blank, comprising punch means for cutting the blankfrom sheet material and for drawing the same and feeding means forfeeding the sheet material to the punch means; the said feeding meanscomprising mechanism operative on the sheet material to place the sameunder tension when engaged by the punch means and to rapidly feed thesame forward when disengaged by the punch means.

42. A shell drawing machine, in combination, provisions for forming ashell from a metal blank comprising punch means for cutting the blankfrom sheet material and for drawing the same and feeding means forfeeding the sheet material to the punch means; the said feeding meanscomprising mechanism operative on the sheet material to place the sameunder tension when engaged by the punch means and to rapidly l'rd thesame forward when disengaged by the punch means and means for checkingthe forward movement of the said sheet material.

4.3. A shell drawing machine, in combination, provisions for forming ashell from a metal blank comprising punch means for cutting the blankfrom sheet material and for drawing the same and feeding means forfeeding the sheet material to the punch means; the said feeding meanscomprising feed rolls engaging the sheet material, elements for placingthe feed rolls under tension when the material is engaged by the punch,the tensioned feed rolls and the said elements cooperating to exert aquick acting feeding pull on the material to feed the same forwardlyrapidly when disengaged by the punch means.

44. 'A shell drawing machine, in combination, provisions for forming ashell from a metal blank comprising punch means for cutting the blankfrom sheet material and for drawing the same and feeding means forfeeding the sheet material to the punch means; the said feeding meanscomprising feed rolls engaging the sheet material, elements for placingthe feed rolls under tension when the material is engaged by the punch,the tensioned feed rolls and the said elements cooperating to exert aquick acting feeding pull on the material to feed the same forwardrapidly when disengaged by the punch means, and means for checking theforward momentum of the feed material.

4-5. A shell drawing machine, in combination, provisions for forming ashell from a metal blank comprising punch means for cutting the blankfrom sheet material and for drawing the same and feeding means forfeeding the sheet material to the punch means: the said feeding meanscomprising feed rolls engaging the sheet material, elements for placingthe feed rolls under tension when the material is engaged by the punch,the tensioned feed rolls and the said elements cooperating to exert aquick acting feeding pull on the material to feed the same forwardrapidly when disengaged by the punch means; the said elements beingintermittently operated by the drawing stroke of the punch means.

46. A shell drawing machine, in combination, provisions for forming ashell from a. metal blank comprising punch means for cutting the blankfrom sheet material and for drawing the same and feeding means forfeeding the sheet material to the punch means; the said feeding meanscomprising mechanism operative on the sheet material to place the sameunder tension when engaged by the punch means and to rapidly feed thesame forward when disengaged by the punch means and means for checkingthe forward movement of the said sheet material; the said mechanismincluding an intermittently operable roll feed on one side of the punchmeans, the said checking means including a continuously operable rollfeed on the other side of the punch means.

t. A shell drawing machine, in combination, provisions for forming ashell from a metal blank comprising punch means for cutting the blankfrom sheet material and drawing the same and feeding means for feedingthe sheet material to the punch means; the said feeding means comprisingan intermittently operable feeding member operative on the sheetmaterial to place the same under tension when engaged by the punch meansand to rapidly feed the same forward when disengaged by the punch meansand mechanism cooperating therewith and active upon for checking thefeeding of the said sheet material.

48. A shell drawing machine, in combination, provisions for forminga'shell from a metal blank comprising punch means for cutting the blankfrom sheet material and drawing the same and feeding means for feedingthe sheet material to the punch means; the said feeding means comprisingan intermittently operable feeding member operative on the sheetmaterial to feed the same forward and mechanism cooperating therewithfor checking the feeding of the said sheet material, the said feedingmember belng operative to efiect a substantially instantaneous feed ofthe material when released by the punch means. I

49. A. shell drawing machine, in combination, provisions for forming ashell from .a metal blank comprising a series of telescoping punch meansfor cutting the blank :erative on the sheet material to place the sameunder tension when engaged by the punch means and to rapidly feed thesame forward when disengaged by the punch means.

50. In a shell drawing machine, a feeding means for feeding sheetmaterial to a punch 7 means, the said feeding means comprising mechanismoperative on thesheet material to place the same under tensionwhen'engaged by the punch means and to rapidly feed the same forwardwhen disengaged by the punch means.

51. In a shell drawing machine, a feeding means for feeding sheetmaterial to a punch means, the said feeding means comprising mechanismoperatlve on the sheet material to place the same under tension whenengaged by the, punch means and to rapidly feed the same forward whendisengaged by the punch means and means active upon for checking theforward movement of the said sheet material.

. 52. In a shell drawing machine, a feeding means for feeding sheetmaterial to a punch means, the said. feeding means comprising feedrolls. engaging the sheet-material, elements for placing the feed rollsunder tension when the material is engaged by the punch,-the tensionedfeed rolls and the said elements cooperating to exert a quick act-.

ing feeding pull on the material to feed the same forward. rapidly whendisengaged by the punch means.

53. In a shell drawing machine, a feedingmeans for feeding sheetmaterial to a punch means, the said feeding means comprising feed rollsengaging the sheet material, elements for replacing the feed rolls underten sion when the material is engaged by the I Y punch, thetensionedfeed rolls and the said elements cooperating to exert a quick actingfeeding pull on the material to feed the same forward rapidly whendisengaged "by the punch means and means for checking the forwardmomentum of the ma i tobe removed from and replaced in the terial.

54. In ashell drawing machine, a feeding means for feeding sheetmaterial to a-punch means, the said feeding means comprising mechanismoperative on the sheet material to place the same under tension whenengaged by the punch means and to [rapidly means for feeding sheetmaterial to a punch means, the said feeding means comprlsing an'intermittentlyoperable feeding member operative on the sheet materialto place the same under tension when engaged by the punch means and torapidly feed the same forward when disengaged by the punch means andmechanism cooperating therewith and active upon for checking the feedingof the said sheet material.

56. In a shell drawing machine, a feeding means for feeding sheetmaterial to a punch means, the said feeding means comprising anintermittently operable feeding member operative on the sheet materialto feed the same forward and mechanism cooperating therewith and alsoactive upon for checking the feeding of the said sheet material; saidfeeding means'beingoperative to effect a rapid feed of the material whenreleased by the punch means.

57. In a' shell drawing machine, a bed,

a plurality of telescoping punches mounted for reciprocation above saidbed, a plurality of matrices having openings of graduated diameterslocated below said bed, means for actuating the punches successively formating cooperation withthe matrices and means arranged below the bed forremovably supporting the matrices including mechanism for permittingremoval and re lacement of the matrices from below the bed I 58. In ashell drawing machine, an operating bed, a plurality of telescopingpunches mounted for reciprocation above said bed, a matrix casingsupported on the bed, matrix means removably contained in said casingand means for supporting the matrix means in the casing constructed topermit the matrix means to be removed from and replaced in the casingfrom beneath the bed.

59. In a shell drawing'machine, an operating bed, a plurality oftelescoping punches mounted for reciprocation above said bed, a matrixcasing dependingly supported on the .bed, matrix means removablycontained in said casing and means for supporting the "matrix means inthe casing including mechanism for permitting the matrix means "casingfrom beneath the bed.

said bed, a matrix casing supported on the bed, a lurality of matriceshaving openings V o graduated diameter removably contained in saidcasing and means for supporting the matrices in the casing conmember forsupporting the matrix means structed to permit the matrices to be reinthe casing and arranged to permit the 10 moved from and replaced in thecasing from matrix means to be removed from and rebeneath the bed.placed in the casin from beneath the bed.

a 61. In a shell drawing machine, an oper- Signed at New %ork in thecounty of v ating bed, a matrix casing supported New York and State ofNew York this 20th thereon, matrix means removably contained day ofOctober A. D. 1921. in said casing and means including a slide PHILIP J.GREAYER.

